Hand starting device for explosive-engines.



Wifneaoeo u R. MoKEE.

HAND STARTING DEVICE FOR EXPLOSIVE ENGINES.

Patentd May 23, 1911.

2 BHBETB-BHEET 1- APPLICATION TILED JULY 29, 1908.

Elnventoz W a 5A.,

, R. MoK EE. HAND STARTING DEVICE FOR EXPLOBIVE ENGINES.

A PPPPPPPPPPPPPPPP ULY 29, 1908. Patented May I 2 EEEEE 8-BEBBT 2.

% 2v If I 2b 26 F/ G. 4

-wygymwmmxm 1'0 all whom it may concern:

UNITED STAWENT OFFICE.

'aonnarmoxnn, or rnrran'nrrnra, PENNSYLVANI-A;-

HAND STARTING DEVICE FOR EXPLOSIVE-ENGINES.

Be it known that I, ROBERT MoKnn, a citizen of the United States, and resident of the city; and county of Philadelphia and.

move in an opposite direction of rotation from the one desired, such as explosive engines, &c. The ob ect or my invention is to so construct a hand operated device, that no injury will occur to the operator, or to the device or other mechanism in case mechanism (explosive engines, 620.) should rotate 'in oppos1te direction from the one desired;

also, to provide a device which canlbe operated in either direction.

With this object in view my invention consists incertain constructions and combination of parts asfully set forthand specifically claimed hereinafter, reference being had to the accompanying drawings, in

' which device embodying my invention; Fig. 2 is a Figure 1 is a side elevation of a starting front elevation of .the same; Fig. 3 is a sectional elevation of the same; and Fig. 4

is an enlarged view of a portion of Fig. 3.

2 is the explosive engine or other mechanism to be started into operation and 3 is its shaft which is to be rotated by hand preliminary to such operation. Y

4 is a pinion or notched wheel and may be considered as a ratchet wheel.

5 is a detachable hand lever having a jaw 6 at the bottom adapted to fit over the motor shaft'3 between the bearing and the ratchet wheel 4. This lever may .be locked to the shaft by a bolt 7 which is spring pressed into locking position by a spring 9 surrounding a rod 8 extending upward from the bolt and provided with a hand knob 10 at the 'top for withdrawing the bolt when it is desired to dlsengage the lever.

- 11 is an arm frictionally held upon the lever 5 by having a lateral stud 12 extended Specification of Letters Patent.-

Application filed July 29, 1908. Seflal 170. 445,862.

Patented May 23,1911...

throu h said lever and provided with nuts 14 and a washer 13. Between the arm ll'and the lever 5 and likewise, between the washer 13 and the lever 5, are arranged friction washers 15 of vulcanized fiber or other suit-'; able material. ably held to the stud 12 by a spline so as'to rotate with it and the arm 11, although my invention would be complied with by having the frictional resistance between the parts 5 and 11 in any manner. These parts are clamped so that a considerable force is required to rotate the arm 11 about the axis of its stud 12 by which it is pivoted to the lever 5.

'Projectin from the arm 11, out of alinement with t e axis of the stud 12, is a crank pin or stud I6 and this is normally arranged at a position immediately below the stud 12 and nearestthe shaft 3 which is to be rotated. Pivoted upon this stud 16 is a IGVGISi-r ble pawl 17 which may be thrown so as to engage the ratchet wheel 4 upon either side of the said stud 16, according to which direction the shaft 3 is to be rotated. When not in engaging position, the pawl 17 may be The washer 13, is prefer- Itwill now be understood that, if the parts are as shown in Fig. 2 and the shaft 3 is to be rotated to the left, the lever 5 will be pulled to the left and the pawl 17 will rotate the shaft 3 in that direction through its engagement with the ratchet wheel 4:. If however, because of a premature explosion or from other reason, the shaft' 3 was suddenly rotated to the right with great force, the awl 17 would be also thrown to the left an acting on the stud 16 would oscillate the arm 11 about the axis of its stud1 12 by overcoming the frictional connection of arm 11 with the lever 5. Underthese conditions, the pawl 17 would be moved around sufficiently to release the ratchet wheel 4'; and the shaft 3 and'ratchet wheel would be free to continue the rotation thus started without .breakin any of the mechanism and without pulling the lever 5 out of the hand of the operator, or injuring his arm.

From the foregoing description it will be seen that, the essential feature of the invention is in providing a yielding couple with the shaft to be rotated so that the connection,

adapted to an explosive engine shaft or.

equivalent part having connecting power transmitting devices frictionally held in 0perative relation and capable of being displaced or shifted to release the shaft from the hand operated means shouldan abnormal and sudden reverse rotation of the shaft take place.

In the mechanism shown, the lever 5 may be made operative in either direction by simply throwing the pawl 17 to one side or the other of the stud 16. To reset the arm.

11, in case of displacement upon the lever 5, it is only necessary ,to loosen the nuts l l and after readjusting the arm =11, to again tight-en the nutsto create the desired fri'cf tion between the parts 11, 13, 5 and 15. If

' ploslon,

desired, instead of loosening the nuts 14=, the arm 11 may. be forcibly returned to its normal position. r

The hand lever maybe allowed to remain in connection withth'e shaft, or may be detached by simpl pulling the bolt 7 and withdrawing .the yo epart of the lever from the shaft.

To overcome any strain whatever upon the arm of the operator due to the premature exsuch as'is likely to occur with a gas or explosive engine, I prefer to provide means which will lock the hand lever against movement at all positions under such conditions. This means comprises a rack 20secured to the engine 2 or other part fixedly located with respect t the shaft 3 to be rotated, the said rack being preferably provided at each end with stops 22 to limit the throw of the hand lever 5; a pawl 21 pivoted to'the hand lever and adapted to engage the rack 20, upon either side of the lever as may be desired, said pawl having a recess 28 v which may engage a spring detent 29 wherea and. pawl.

by the pawl I out of contact with the rackwhen desired;

a push pin 27 carried by the handle26 of the hand lever and'sustained by a spring.-

25; and a link 23 connecting the push pin The spring 25 and push pin-27 are so made that the pawl 21 may over to reverse its connection with the rack without disconnecting an of the joints.

The operation of this coking means last, described is as that the operator is pulling the upper end of the hand lever 5 to the left, the pa'wl 21 may be raised and supported.

be thrown."

follows: Assuming as before.

will trip over the teeth of the rack without resistance. By pressing upon the spring push pin 27 the pawl 21 may be thrown out of engagement with the rack 20 when it is desired to return thelever to its starting position. Should, from any cause, the shaft 3 be suddenly rotated in a reverse direction the tendency to throw the lever 5 to the right will be resisted by to its engagement with the rack 20; Under such conditions no objectionable jar or strain can be put upon the operator.

The invention in its broad employ with a hand operated part, and connecting means between said hand operated part and shaft to produce rotationv in the latter and embodying releasing means operating under severe stress to modify or change the operative connection between-the hand operated the pawl 21 owing aspect would the shaft to be rotated, combined part and shaft, wherebysaid hand operated part may be held against movementin case of a sudden and violent reversal in the direction of rotation .of the shaft. v r While I have shown my invention embodied in the form which I have found to excellently adapted for commercial use, I do not restrict myself to the details thereof, as they may be modified without departing from the spiritof the invention.

Having now described my invention, what I claim as newand desire tosecure by Letters Patent, is: D

1. In apparatus of the character described, the combination of .a shaft to be rotated, hand operated means, and'connecting de-, vices frictionallyheld upon the hand operated means and located between the shaft and hand operated means for rotating the shaft and yielding for displacing the parts constituting den .and excessive stress without reversing the direction of movement of the hand operated means. 21 In .appara us of the character described, the combination of the shaft to rotated, a hand lever journaled concentrically on the shaft, a ratchet wheel secured to the shaft, a frictionally held crank carried .by the hand lever,

and a pawl hinged to the crank and normally engaging the ratchet wheel. p 3. In apparatus of the character described, the combination of the shaft to be rotated, a hand lever journaled concentrically on the'shaft, a ratchet wheel secured to the shaft, a frictionally held crank car- .ried by the hand lever, a pawl hinged to the crank and normally engaging the ratchet wheel, and means .of engagement with the ratchet wheel.

4. In apparatus of the character described, the combination of the shaft to be rotated, a hand lever journaled concentrithe connecting devices and per- I mitting the shaft to be reversed under sudfor locking the pawl out i ried by the hand lever-for engaging the sta tionary rack'to prevent sudden backward movement-of the handlevenycally on the shaft,*a ratchet wheel'secured to 5."Infi-apparatus of the character described,' the combination of the shaft to be rotated, a hand lever 'journaled concentri- 3 the shaft, a.' frictionally held crank carried by the .hand lever,-a pawl hinged, to the crank Iand normally engaging the I ratchet wheel, a stationary rack, apawl carried by the hand lever for engaging the stationary rack to prevent sudden backward movement of the hand lever, and means for throwing the pawl out of engagement with the rack.

.6. In apparatus ,of the character del scribed, the combination of a shaft to beretated, a ha'ndo ratedlever, connecting de= vices between t e.- shaftand hand operated lever held in position b'y' -friction' for rotating the shaft and havingreleasing mecha'-.

nism overcoming the friction for dlsplacing the parts const tutin the connecting devices and ermitting t e shaft'to' be reversed under su den. and excessive stress without reversing the direction -of.or shiftin move ment 'of the hand operated lever, an means independent of the connecting devices for directly locking. the hand 'operated lever against movement iii a backward direction.

7. In apparatus ofthe character de- I scribed,-the combination of theshaft to be rotated, a hand lever,".and connecting de-' 'vices between the hand lever and, shaft which consists of a; ratchet wheel, a pawl engaging the ratchet wheel, and yielding connections between the hand lever and the pawl whereby the latter may have its osition of connection with the band ever shifted under the action of the ratchet wheel tothrow said pawl 8. In apparatus of the character described, the combination of the shaft to be rotated, a hand lever, and connectingde vices between, the hand lever and shaftwhich consists of a ratchet wheel, a pawl engaging the ratchet wheel, yielding connections between the hand lever and the pawl whereby the latter may have itsosition of connection with the hand ever shifted underthe action of'the ratchet wheel when suddenly reversedto throw said pawl .out of operation, and means for locking the hand lever against movement during the time the yielding connections are being shifted.

9. In an apparatus of'the character described, the combination of the shaft to -be rotated, a ratchet wheel 4 therefor, a hand" leverjournaled adjacent to the shaft, an arm 11 frictionally held to the hand lever, and a pawl17 hinged to the arm 11 to one side of its connection with the hand lever and engaging the ratchet wheel. g 10. In an apparatus of the character described, thecombination of the shaft to be rotated, a ratchet wheel 4 therefor, a hand lever journaled adjacent ,to the shaft, an arm'll frictionally held to the hand lever by a stud 12, friction washers 15 through which the stud extends and arranged u on each side of the hand lever, a metal was er .13 pressing against one of the friction washers, nuts 14 for the stud-for clamping the friction washers in. place, and a pawl-17' hinged to the arm 11 to one side of its connection with the hand lever and engaging the ratchet wheel. i

j 11. In an apparatus of the character described, the combination'of the shaft to be rotated, a ratchet wheel'4 therefor, a hand lever journaled adjacent to the shaft, an arm 11 frictionally, held to the hand. lever, a pawl l7 hinged to dream 11 to-one side of its connection with the hand lever and engaging the ratchet wheel, a fixed rack 20, and a pawl hinged to thehand lever and en- 7 gaging the rack. a

12. In 'an apparatus of the character de scribed, the 'combination of the-shaft to be rotated, a ratchet wheel 4'on said shaft, a handlever j'ournaled adjacent to the shaft,

'an arm 11 frictionally held to the hand le-' ver, a pawl 17 hinged to arm 11 to one side of the connection with the hand lever and engaging the ratchet wheel, a fixed rack 20, a pawl hinged to the hand lever and engaging the rack, and means on the hand lever for throwing the pawl out of engagement with the rack.

13. Inan apparatus of the character described, the combination of the shaft to be .rotated, a pivoted hand lever, power transmitting connections for rotating the shaft in one directionand releasing it in case of sudden reversal, a fixed rack, a pawl on the hand lever engaging the rack to prevent reversal of movement to the hand lever in case of sudden reversal of shaft, and means on the hand lever for throwing the -.pawl out of engagement with the rack.

' n testimony of which invention, I have hereunto set my hand.

ROBERT MoKEE;

Witnesses R. M. HUNTER,

' R.1M. KELLY.

copies of this patent may be obtained for'flve cents each, 'by Washington, D. 0,

addressing the "Oommlisatoner of Patents, 

